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- Title
Assessing drought resistance in seashore paspalum genotypes using leaf gas exchange, osmotic adjustment, and rooting characteristics.
- Authors
Katuwal, Krishna B; Tishchenko, Viktor; Jespersen, David
- Abstract
The objective of this study was to compare drought resistance in a range of seashore paspalum (Paspalum vaginatum Sw.) genotypes and identify associated morphological and physiological traits. Fifteen genotypes were grown in growth chamber conditions and exposed to well‐watered and drought‐stress treatments. Genotypes 'Seaisle1' and PI647891 were consistent top performers, whereas 'Seastar' and PI614680 performed poorly as measured by turf quality, percentage green cover, and relative water content when exposed to drought stress. Observed levels of drought resistance had no significant relation with morphological traits such as leaf width and internode length but were found to be associated with various physiological traits. Drought resistant genotypes were able to better maintain membrane stability, photosynthesis, and had greater water use efficiency compared with sensitive genotypes. Earlier osmotic adjustment at 7 d via faster osmolyte accumulation was a significant contributor to performance during drought. Drought‐resistant Seaisle1 and PI647891 had deeper roots and greater root length density than drought sensitive 'Seastar' and PI614680. Results showing variability in the level of drought resistance and associated mechanisms in understudied seashore paspalum genotypes could facilitate future breeding efforts for developing drought‐resistant turfgrass cultivars. Core Ideas: Drought is a major stress that damages the warm‐season turfgrass Seashore paspalumControlled environment studies explored drought resistance among Seashore paspalum genotypesMembrane stability, osmotic adjustment and maintenance of photosynthesis were important traits
- Subjects
DROUGHT management; SEASHORE; DROUGHTS; WATER efficiency; GENOTYPES; PLANT-water relationships
- Publication
Crop Science, 2021, Vol 61, Issue 3, p2121
- ISSN
0011-183X
- Publication type
Article
- DOI
10.1002/csc2.20420